I wanted the 3M colorquartz pretty bad too but I called 3M who forwarded me to the new company who makes it who said the closest it is to MA is DC I believe, and they wouldnt ship under 100 bags haha.
I went with seachem flourite black sand, and was very disappointed because it should be called seachem flourite gray clay....nowwhere near dark black, which wouldnt matter if its covered with plants but I'm only going to have a few tall plants. It did grow the hell out of some plant bulbs in the week I had it in my tank.
I switched it out for tahitian moon sand...couldnt be happier it looks awesome.
flourite black sand comes in 15lb bags for around $26 each shipped from amazon. For my 90 I rinsed 6 of them for over an hour and it was still ultra cloudy and dirty. Might have been able to get away with 5 bags but probly not.
TMS was $20 a bag for 20lb bag at LFS and 3 bags was plenty. The flourite black sand is much more dense so you dont get as much coverage from the same weight of sand.
If you want a LOT of plants and dont care as much about the look of the sand, and want to spend a little more and have to rinse, get flourite black sand.
If you want black awesome looking sand, get some TMS, throw some root tabs in there if you want some plants. The shiny specks you see in pictures in the TMS look really good in real life...I didnt like the look of it from pictures but in person its great.